iPad Wifi issue after ios 4.2.1

Has anyone else noticed a significantly slower wifi connection since new ios release? I know there is some talk and I have tried the majority of the alleged fixes, but I still noticed a huge decrease. I have a 20meg connection and my Macbook's gets around a 15-17meg download on average and since new upgrade the iPad is running 5-8meg max. Prior to the update the iPad was on average 10-12 consistently. This is a big deal, because the majority of my iPad usage is for internet browsing on the couch, etc...

Anyone else come up with a good fix or know the reason for that big of a drop? Thanks!

For me, my iPad, iPhone 4 and Apple TV2's WiFi speed depends on what type of 802.11 speed the router(Thompson's O2 Wireless III) is set at.
When it's set to N(the fastest in theory), my iPad's WiFi speed is terrible - regardless of what channel it's set to or automatic.
When set to G(or even b/g), the connection is fast - HQ videos load almost instantly, and the white/grey buffering bar fills up satisfyingly.

I have had the same issues with the upgrade and even after trying all suggested fixes across many forums, I am still stuck with painfully slow page loads. I only had the iPad a month before the upgrade so it was still really fresh in my mind how incredibly fast the page loads were prior. I really hope they come out with a fix - last night some of my attempts were actually timing out. We have an excellent internet speed and nothing else from MBP to iPod touch was still functioning superbly. Frustrating.

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